Question

were a protozoa appear ​

Answer 1

Answer:

Protozoa are single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. They first appeared in water.

Answer 2

Answer:

Protozoa are single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. They first appeared in water.